Papeb cutting machine



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R.. MIEHLE. PAPER CUTTING MACHINE.

No. 539,070, Patented M 14, 1895;

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R. MIEHLE. PAPER CUTTING MACHINE- No. 539,070. Patented May 14, 1895.

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PAPER GUTTING MACHINE. No. 539,070.. Patented May 14, 1895.

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R. MIEHLE. PAPER CUTTING MACHINE.

.No. 539,070. Patented May 14, 1895.

Wnwawaz 01:, I y M UNITED STATES 1 ROBERT PATENT OF ICE MIEHLE, OFCHICAGO, ILLINOI S, ASSIGNOR TO THE SHNIEDEWEND & LEE COMPANY, OF SAMEPLACE.

PAPER-CUTTlNG MACHINE.

SPECIFICATION forming part of Letters Patent No. 539,07Q, dated May 14,1895.

Application filed January 25, 1893. $erial No; 459,734 (Ne modelJ T 0all whom it may concern;

Be it known that I, ROBERT MIEHLE, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois,

5 have invented certain new and useful Innprovements in Paper-OuttingMachines, of which the following is a full, clear, and exactspecification.

My invention relates to that class of paper to cutting machines in whichthe power for actuating the knife is derived from a continually rotatingshaft having detachable clutch connection with the knife-operatingmechanism, which clutch is adapted to be disengaged by an automaticthrow-off or stop mechanism at the conclusion of each operation orreturn movement of the knife.

My invention also relates to that class of paper cutting machines inwhich the rising and falling clamp or presser-bar employed for holdingthe paper in position, is actuated when desired by the hand of theoperator, and the knife is actuated in an oblique direction by a linkconnection between one end thereof and the knife-operating mechanism.

Heretofore considerable difliculty has been experienced by the movinglug of the stop mechanism or throw-off hanging on the throwoff lever ortrip after the clutch-members are fully disengaged and the machinerendered inactive, thus necessitating starting the machine by handbefore the clutch-members can be again brought into engagement and themachine thrown into positive operation. Part of myimprovements,therefore, relate to the stop mechanism or throw-off, and hence one ofthe important objects of my invention is to cause the moving lug of thestop mechanism or throw-off and the trip or throw-0E lever to continueto move with relation to each other after coming into engagement, untilthey shall fully disengage.

More specifically speaking, the object of my invention in this respectis to cause themov- 5 ing lug of the stop mechanism or throw-off tofully pass the trip or throw-off lever which it actuates, before themovable clutch-member has reached the limit of its movement away fromthe fixed member. Another object of my invention is to provide improvedmeans for causing the movable part or member of the clutch or otherdetachable connectionv between the driving shaft and knife-operatingmechanism, to continue to move away from the other member after theyhave become fully disengaged, whereby danger of accidental re-engagementwill be avoided; and yet another object of my invention is to check therunning of the machine after the positive driving power is removed andto avoid the heretofore existing frictional resistance to the operationof the machine after such positive driving power is applied.

' The remainder of my improvements relate to the means for actuating theclamp or presser-bar, and hence my invention has for its further objectto provide improved means for applying the pressure or power to bothends of such bar simultaneously, in a ma- 7o chine having a knifeoperated substantially in the manner hereinbefore described. With theseends in view, my invention consists in certain features of novelty inthe construction, combination and arrangement of parts as hereinafterfully described with reference to the accompanying drawings and moreparticularly pointed out in the claims. 7

. In the said drawings, Figure 1 is an elevation of the machine viewingthe same from the position which the'operator occupies.

Fig. 2 is a detail view of a portion of the throw-0E mechanismhereinafter described. Fig. 8 is a plan view showing a portion of theframe or guide-standards in section. Fig. at is an end elevationillustrating the mechanism for operating the clamp or presser-bar, themechanism in the rear being omitted for the sake of clearness. Fig. 5 isa viewsimilar to Fig. 4, but of the other end of the mao chine, the maindriving shaft being shown in section. Fig.6 is an enlarged detail faceview of the brake and certainv gear-wheels hereinafter described; Fig. 7is a side elevation of the same; and Fig. 8 is a sectional view taken 95 on the line 8 8, Fig. 6.

In the drawings, wherein like signs of reference indicate like partsthroughout the several views, 1 is in the main frame, having a table 2,rising from which are the guide standards 3, in which latter the knife 4and presser-bar 5 are mounted and guided as usual, and 6 is the maindriving shaft, which may derive its motion from any suitable belt orband, not shown, running over the pulleys 7 and which is provided with adetachable connection with the knifeoperating mechanism. As a convenientand efficient form of such a detachable connection I have shown andprefer to employ a clutchconsisting of two members 8, 9, the former ofwhich is capable of longitudinal movement on the shaft (1, but is causedto rotate therewith by means of a spline 10 in the ordinary manner,while the other member 9 is mounted loosely upon the shaft and issecured to or formed integrally with a pinion 11, which isin permanentengagement with a spur or gear-wheel 12 mounted upon a shaft 13 suitablyjournalod in bearings 14 on the main frame 1 or other fixed portion ofthe machine.

The knife 4 is preferably operated by means of a pivoted lever 15 whichderives its motion from a wrist-pin 16 playing in a slot formed in theend of such lever and being adapted to impart an oscillatory movementthereto, as will be understood. mounted dirtctly upon one side of thelarge gear-wheel 17, which derives its motion from a pinion 18 driven bymiter-gear connection 19 with the shaft 13, the lever 15 being connectedto one end. of knife 4 by means of a link 20, as usual, and the knifebeing so mounted as to rise and fall in an oblique direction, the usualmeans of mounting the knife for producing such movement being a pair ofparallel arms 21 which I have shown and prefer to use.

The movable clutch member 8 may be thrown into and out of engagementwith its mate 9 by means of an upright hand lever 22 which is providedwith any suitable connection with the member 8, such as a fork 23engaging in a peripheral groove 24 formed in the clutch-member, andwhich lever forms a part of the stop mechanism or throw-off hereinafterdescribed. By throwing this lever inward or outward, the machine may bethrown into or out of operation, but in order that the ma chine may bethrown off or out of operation automatically when the knife hascompletedits upward movement, such lever is secured to a horizontal shaft 25mounted in suitable bearings 26 and having ashort laterally projectingcran karm 27 secured thereto and having pivotal connection with a secondlever 28 pivoted to the frame 1 and having an inwardly projecting end 29which constitutes a trip with which a moving lug 30 carried by the knife-operating mechanism engages for effecting the disengagement of theclutch-members.

Inasmuch as the levers 22 and 27 are socured to the same shaft, theyconstitute in effect a bell-crank lever and will be termed such. Theinterposition of the lever 28 between the lug 30 and the lever 28, 29,32, is resorted to as a convenient means of converting This wrist-pinmay be the downward movement of the lug into anupward movement of thelever 27, and a consequent outward movement of the clutch member 8. Thisis done because it is desirable to have the movable clutch-member on theouter side and the pinion 11 and spurwheel 12 arranged on the inner sideas near to the frame as possible, thus necessitating the outwardmovement of the movable clutehmember in order to effect itsdisengagement with its mate; butI do not wish to confine myself to thisparticular arrangement or construction, as the same might be deviatedfrom by any skilled mechanic.

The connection between the lever 28 and the arm 27 may be effected byproviding such arm with a rounded end or head 31 and the end of thelever 28 with a circular socket 353 in which said head 31 fits.

The disengaging-lug 30, which forms a part of the throw-off or stopmechanism just described, is mounted upon and carried by the gear-wheel17, and instead of being a fixed lug as heretofore it isin the form ofan arm or lever pivoted at 35 to a part of the wheel 17 and having itsend arranged loosely between two stops 3& between which its end plays.As the wheel 17 rotates, the lug 30 will be carried around and will restupon the lower one of the steps 34 until its end reaches the end 29 ofthe trip 28, which, if the clutchmembers are in engagement, will beengaged by the lug 30 and the lug will be forced upward until it bearsagainst the upper one of the steps 34, whereupon it will begin todepress the end 29 of the trip and thus effect the disengagement of theclutch members through the connections described. Inasmuch as a brake,hereinafter described, is employed for arresting the further movement ofthe knifeoperating mechanism after the clutches are disengaged,it standsto reason that the lug 30, if a fixture, will not, or atleast mightnot,fully pass the end 29 of the trip before the move ment of the wheel17 is arrested, because it is obvious that as soon as the clutch-membersdisengage, therotation of the wheel 17 ceases and such members cannot bedisengaged by the lug 3O alone if such lug passes the trip 29 before thedisengagement is fully elfected; but with a pivoted lug as shown anddescribed, the parts may be so adjusted that. the end 29 of the trip,while it may be opposite the end of the lug when the rotation of thewheel 17 ceases, will be entirely from under the lug and will permit itto fall by gravity independently of the wheel 17 until it strikes itslower stop 3%, thus leaving the end 29 of the trip free to move inwardtoward the wheel 17 when it is desired toagain throw the machine intooperation by forcing the hand-lever 22 inward.

While the pivotingnf the lug will effectually avoid the hanging thereofon the trip lever, it does not avoid the accidental re-eugagement of theclutch-members as before described, and in order that this also maybeaccomplished and the disengagement of the lug with the trip at theconclusion of the operation rendered absolutely certain, I provide thehand-lever 22 with a' hearing or projecting pin 35, upon which bears aflat spring 36 having near the outer end thereof an incline or cam 37turned upwardly and terminating in a hook or rest 38 for the pin 35. Thelocation of this incline 37 with relation to the movement of the lever22 is such that the automatic movement of the lever 22 resulting fromthe engagement of the lug with the trip, will bring the pin to the inneredge or end of the incline 37, and as the spring 36 exerts normally adownward pressure upon the pin 35, it will be seen that as soon as thepin reaches such point, the incline 37 will act to force the pin fartheroutward, carrying the lever 22 away from the machineand consequentlycontinuing the movement of the clutch-member 8 away from its mate, andalso still further depressing the end 29 of the trip and allowing thepivoted lug 30 to drop to its lower stop 34 if by any possibility thelug should hang upon the trip. The spring 36 is also inclined downwardlytoward. the lever 2 in order that it may serve to hold the clutchmembersfrom accidental disengagement.

39 is a brake-lever, which is pivoted to an ear 39 formed on a bracket40 secured. by bolt 41 to the frame of the machine and having adepending lip 42 which overhangs the teeth of the pinion 11 and servesto hold such pinion in engagement with the gear 12. The lower end 43 ofthis lever 39 is provided with a set-screw 44 which engages in a cavityformed in the outer side of a brake-shoe 45, as shown more clearly inFig. 7, and serves to hold such shoe against the face of the gearwheel12, the arm 43 of such brake-lever being very short as compared with thelength of the lever, whereby a slight pressure on the upper end of thelever will force the brakeshoe against the wheel 12 with great pressureand instantly arrest the movement of the knife-operating mechanism.

In order that the automatic application and withdrawal of the brake maybe effected, I arrange the lever 39 in such aposition that it will bestruck by some member of the throwotf mechanism after such mechanism haseffected the disengagement of the clutch-members. As a convenient meansof accomplishing this, I arrange the lever 39 in the line of movement ofthe pin 35 so as to be struck by such pin or by the spring 36 justbefore the lever 22 has reached the limit of its outward movement, sothat after the clutch-members are disengaged the further outwardmovement of the lever or downward movement of the spring 36 will effectthe application of the brake to the wheel 12, and, on the other hand,when the lever 22 is thrown inward to cause the clutch-members to engagethe pressure on the brake lever will be released before the clutchmembers come in contact, thus relieving the pressure on the brake beforethe machine starts, and thereby avoiding the resistance to the operationof the machine when starting, heretofore experienced.

Secured to the 0113 side or rear side of the clamp or presser-bar 5 andat each end thereof is an upright rack or toothed bar 46, and

mounted in suitable bearings 47 secured tothe guide standards 3 is atransverse shaft 43 upon which are secured two pinions or spurwheels 49so arranged as to engage respectively'with the racks 46, whereby therotation of such shaft 48 will cause the clamp or presser-bar 5 to moveup and down in its guides.

One end of the shaft 48 is provided with a worm-wheel 50 arranged belowwhich in bearings 51 is a shaft 52 having formed thereon or securedthereto between the bearings 51, a worm-screw 53 which engages with theunder side of the worm-wheel 50 and serves the twofold purpose ofelevating or lowering the clamp or presser-bar and at the same timelocking the'bar in the position to which it is adjusted. The shaft 52 isprovided with a pinion 54 which meshes with a similar pinion 55 arrangedbelow it on a cross-shaft 56. This cross-shaft 56 may be journaled insuitable brackets 57 secured to the side of the frame and provided atits end opposite to the pinion 55 with a wheel 58 which is arranged atthe side of the feed-table 2 so as to be readily accessible to the handof the operator as he stands facing the machine. The shaft 56, it willbe seen, is arranged under or on the outer side of the link 20 whichconnects the knife with the lever 15, so as to be out of the way of suchlink. The advantage of this construction and arrangement of gears foroperating the clamp or presser-bar, it will be seen, is that the racksbeing located at each end of the bar, the pressure is more uniformlydistributed throughout its length, and the handwlieel by which the baris operated,being arranged on the side of the machine where the operatorstands, the inconvenience and danger of injury to the operator resultingfrom passing his arm across or under the knife connections to theopposite side of the machine, are entirely. avoided.

Having thus described my invention, what I claim as new therein, anddesire to secure by Letters Patent, is

1-. In a paper cutting machine,-thecombination with a knife-operatingmechanism,a driving shaft having a detachable connection with saidknife-operating mechanism, and a trip for disengaging said detachableconnection, of an independently movable lug carried by theknife-operating mechanism and adapted to engage said trip, substantiallyas set forth.

2. In a paper cutting machine, the combination with a knife-operatin gmechanism, a driving shaft having a detachable connection with saidknife-operating mechanism,and a trip for disengaging said detachableconnection, of an independently movable lug carried by theknife-operating mechanism and adapted to engage said trip, and means forfurther with- 7 drawing said detachable connection after the drivingshaft has become disengaged with the knife-operating mechanism,substantially as set forth.

3.- In a paper cutting machine, the combination with a knife-operatingmechanism, a driving shaft having a detachable connection with saidknife-operating mechanism, and a trip for disengaging: said detachableconnection, of an independently movable lug carried by theknife-operating mechanism and adapted to engage said trip, a springhaving a cam or incline, and a projection or pin upon which said springbears, connected with said trip, substantially as set forth. i. In apaper cutting machine, the combina-- tion with a knife-operatingmechanism, a driving shaft having a detachable connection with saidknife-operating mechanism, and a throwotf mechanism connected to saiddetachable connection and operated by said'knife-operating mechanism, ofa spring having an incline or cam bearing against a movable part of saidthrow-off mechanism, and being adapted to move the same by virtue of thespring pressure, after said detachable connection has been disconnectedsubstantially as set forth.

5. In a paper cutting machine, the combination with a knife-operatingmechanism, a driving shaft having a detachable connection with said knife-operating mechanism, and a throwol'f mechanism connected to saiddetachable connection and operated by said knife operating mechanism, ofa spring inclined so as to bear normally against a movable part of saidthrow-off mechanism and hold said detachable connection in engagement,and being provided with a supplemental incline adapted to bear againstsaid movable part of the throwoff mechanism and force said detachableconnection out of engagement, substantially as set forth.

6. In a paper cutting machine, the combination with a knife'operatingmechanism, a driving shaft havinga detachable connection with saidknifeoperating mechanism, a lever for disengaging said detachableconnection, and means for causing the knife-operating mechanism tooscillate said lever, of a pin or protherewith, and a throw-offmechanism con nected to said detachable connection and actuated by saidknife operating mechanism, of a spring having a cam or incline portionterminating in a stop, and bearing against and adapted to move a movablepart of said throwoff mechanism, substantially as set forth.

- 8. In a paper cutting machine, the combination with a knife-operatingmechanism, of a pivoted lug carried by said mechanism, and two stopsbetween which said lug plays, a driving shaft having a detachableconnection with said knife-operating mechanism, and a trip for operatingsaid detachable connection, arranged to be engaged by said lug,substantially as set forth.

9. In a paper cutting machine, the combination with a knife-operatingmechanism and a driving shaft havinga clutch connection with saidknife-operating mechanism, of a pivoted bell-crank hand-lever connectedto one member of said clutch, a pin projecting from one arm of saidlever, a spring having a free end inclined downwardly upon said pin andbeing provided with a supplemental incline terminating in a stop, asecond pivoted lever pivoted to the other arm of said bell-crank, andapivoted lug having a limited movement carried by said knife-operatingmechanism and adapted to engage said second lever, substantially as setforth. .i,

10. In a paper cutting machine, the combination with a knife-operatingmechanism and a driving shaft having a detachable connection therewith,of a throw-off mechanism for actuating said detachable connection, abrake for arresting the movement of said knife-opcrating mechanism,having a brake lever, and a spring having an incline adapted to force amember of said throw-off mechanism against said brake-lever,substantially as set forth.

11, In a paper cutting machine, the combination with a knife-operatingmechanism and a driving shaft having a detachable connection therewith,of a throw-off lever for actuating said detachable connection, having aprojection thereon, a spring having an incline bearing against saidprojection, a pivoted brake-lever, having a brake-shoe for arresting themovement of the knife-operating mechanism and being arranged to beactuated by the incline of said spring, substantially as set forth.

ROBERT MIEIILE. Witnesses:

F. A. HOPKINS, EDNA B. JoHNsoN.

